Images of petroglyphs in Mata Ngarau, a sacred site at Orongo on Easter Island. The photographs are mounted on pages that have been removed from a three-ring binder with "Los Petroglifos de Mata Ngarau Orongo" and "Walter Koch M." handwritten on the front. A map of the Mata Ngarau section and a key to where photographs were made is also available with the collection.
Walter M. Koch was a Chilean dentist and amateur photographer of 1970s Orongo.
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Photo Lot 2001-12, Walter M. Koch photographs of Orongo petroglyphs on Easter Island, National Anthropological Archives, Smithsonian Institution.
Donated as part of the Robert Alexander collection to the John Wesley Powell Library of Anthropology (National Museum of Natural History) in 1985. Transferred to the National Anthropological Archives with the Charles Love Easter Island slides.
Additional photographs of Orongo petroglyphs held in National Anthropological Archives Photo Lot 97.